This part of IEC 62056 specifies a connection-less and a connection oriented transport layer (TL) for DLMS/COSEM communication profiles used on IP networks. These TLs provide OSI-style services to the service user DLMS/COSEM AL. The connectionless TL is based on the Internet Standard User Datagram Protocol (UDP). The connectionoriented TL is based on the Internet Standard Transmission Control Protocol (TCP). Annex A shows how the OSI-style TL services can be converted to and from UDP and TCP function calls.
62056-4-7-2015由IEC - International Electrotechnical Commission 发布于 2015-05-01,并于 2015-05-22 实施。
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